werline



(No Model.)

W. F. WOLLIN 8v E. H. WERLINE. ELECTRIC LAMP SOCKET WITH EECULATTNC ATTACHMENT;

Patented Cot. 21, 189C.

me Noam; Peru: co., mrs-urk UNITED STATES PATENT OFFICE.

VILLIAM F. XVOL'LIN AND ELMER H. VERLINE, OF YORK, PENNSYLVANIA.

ELECTRIC-LAMP SOCKET WITH REGULATING ATTACHMENT.

SPECIFICATION forming part of Letters Patent N0. 439,047, dated October 21, 1890.

` Application filed J'anuary2811890. Serial No. 338,390. (No model.)

To all whom. it may concern:

Be it known that we, WILLIAM F. WOLLIN and ELMER HNVERLINE, citizens of the United States,residing at York,in the county of York and State of Pennsylvania, have invented certain new and useful Improvements in Electric-Lamp Sockets with Regulating Attachment; and We do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is an improvement on the electric-lamp socket with light-regulating attachment which forms the subject-matter of our application, Serial No. 327,209, Patent No. 422,360, February 25, 1890; and it consists, mainly, in substituting for the series of resistance-wires shown therein as arranged in the open air or accessible by the air surrounding the socket a series of wires or equivalent con ductors used for the same purpose, but coiled into small compass and inclosed within a sealed receptacle from which the air has been exhausted.

In the accompanying drawings, Figure 1 represents a vertical section of a lam p-socket and regulating attachment embodying our invention, the governor and contact-plates being in perspective. Fig. 2 represents a detail view of one of the resistance-wires, and Fig. 3 a detail View of the governor and contactplates.

A designates the globe of the lamp 5 a, the incandescent filament or wire within the same; A the metallic sleeve encircling the neck of said globe; A2, the block in said neck to which the other end of said wire is attached, and A3, the insulating material separating said block from said sleeve, all substantially as described in said patent. A metallic shell B iits upon said sleeve, these parts being screwthreaded to engage with each other. This shell is enlarged in diameter beyond the said sleeve and extended to inclose the resistancewires and their receptacle, forming a complete socket-casing. From the block A2 a wire O extends upward (when the lamp hangs downward, as shown) to a point of junction c with one of the resistance-wires, and passes thence to a contact plate or stud O. One end of the line-wire is attached to the shell B', the

other end being attached to a governor l, which is capable of being turned on its axis, and is provided with an arm l2. When said arm is in contact with plate or stud O, the resistance-wires are all cut out and the circuit is closed through the line-wire, the wire C, the lamp-filament, and the shell B to thelinewire again.

The resistance-wires D D D2 are shown as three in number; but this may be varied at will. The iirst in order D is connected at one end to the wire C, as shown, and at the other end to a Wire O', which extends to another plate or stud O', which is located at a different point from O within the sweep of the arm l2. lVhen this arm and plate are brought into contact, the circuit is as above stated, except that the wire Oand resistancewire D are brought into it instead 0f the wire C. The light is dimmed correspondingly. The resistance-wire D is similarly connected by one end to a wire C2, ending in contact plate or stud O2, arranged like plates O and O for contact with the arm I2 of the governor. The other end of resistance-wire D is connected to the proximate end of resistancewire D. Vhen the arm I2 is in contact with the plate O2, the two resistance-wires D and D are in the circuit, the Wire O2 taking the place of wire O or C. The next resistancewire D2 is similarly connected by one end to a Wire Ca ending in a contact plate or stud O3, and by the other to resistance-wire D', so that all three resistance-wires may be brought into circuit. The same arrangement is continued for any additional resistance-Wires, and the light may thus be regulated to any required degree. These resistance-wires, as shown, are Wound into the form of helical cylindrical springs and are inclosed Within a receptacle E, preferably of annealed glass, from which the air has been exhausted, leaving these resistance-wires n vacuo.

The governor and contact-plates may be fastened to the lamp casing or shell, if preferred, but will work satisfactorily if attached,

as indicated, to some external fixture.

The inclosing of the resistance n vacuo is found to greatly diminish the amount of heat evolved and thereby increase the durability of the parts, beside doing away in part with the need for compensating automatic adjust- ICO ment of thel resistance-wires to hold them in place. The form now givento them allows all the automatic adjustment that is necessary.

Byvdoing away with the base-ring crownpiece frame and supplemental springs of the aforesaid patent we are able to make the socket very much smaller in diameter, as well as neater and lighter.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In combination with an electric lamp and its socket, an exhausted receiver E, arranged within the casing of said socket, the resistance-Wires D D- D, inclosed within said receiver, each wire being coiled on itself, as shown, the governor Lthe line-wires running to said governor and said. lamp, the wire C,

running from the lamp to the first resistancel wire and also to a contact-point for said governor, and the wires C C203, running from the several resistances to similar contactpoints, the successive resistances being also connected to each other, substantially as set forth.

2. In combination with an electric lamp and its socket, an' exhausted receiver, a series of resistances arranged within said receiver, a series of wires running from said resistances to contact-points, a governor making contact with any one of said points, as desired, electrical connections between said resistances, and awire extending from the first resistance to the lamp and also to a contact-point for said governor, the said resistance-chamber being inclosed Within the casing of thelampsocket, substantially as set forth.

In testimony whereof we aix our signatures in. presence of two witnesses.

WILLIAM F. WOLLIN. e ELMER H. WERLINE. Witnesses:

EDWARD S. HARRIS', I-I.y M. DAVIS. 

